Trama

When a chance encounter with an astrological reader causes the Walkers to wake up to a full body switch, can they unite to land a promotion, college interview, record deal, and soccer tryout?

The Walkers are a nuclear family of five: Mom Jess, Dad Bill, 16 year old daughter CC, 14 year old son WYATT, and 2 year old son Miles. But when a mysterious event occurs at the Griffith Park Planetarium, the nuclear elements split and recombine; Jess's mind is in CC's body (and vice versa), while Bill's mind is in WYATT's body (and vice versa). While CC and Wyatt try to navigate the impossibly complicated world that is adulthood (responsibilities, skills, fears, ambitions), Jess and Bill must work their way through the insanely intricate network of rites of passage (bullying, soccer games, music, parties, romance) that comes with being a teenager, while all four scramble to undo the spell that catastrophically recombined their personalities.

Jess and Bill Walker are raising CC, Wyatt and Miles in an LA suburb. The night before Jess, CC and Wyatt all have potentially life-changing challenges, they do a family excursion to a planetarium. There, they are all arguing vehemently when they ask an apparently random woman to take their photo.

Angelica observes them all bickering, all saying they wished their corresponding parent-child could know what it's like to walk in their shoes. When she snaps the picture, a strange and powerful cosmic blast strikes the telescope, knocking the family off the platform, and damaging the telescope.

They wake in the morning with architect Jess body switched with 17 y.o. soccer star CC, and guitarist Bill with 13 y.o. Yale candidate Wyatt. Just when they realize the planetarium blast likely caused the transformation, they see that Miles and their dog Pickles also switched.

Seeing the French Bulldog tearing across the lawn, the family follows close behind. They finally catch up with their baby/dog at their neighnor Rolf's, who offers to teach Pickles obedience.

All six of them go to the planetarium and are told the telescope is being repaired, and Bill bribes maintainence to finish by evening. Accepting that they have to make do for the day, they leave Miles/Pickles with Rolf.

Jess/CC accompanies CC/Jess to work to coach her through an important presentation, which could get her a promotion. The teen binges ice cream while Jess/CC preps her index cards. Awkward from the start, CC/Jess soon has to hurry to the toilet when her lactose intolerance hits. Afterwards they go to the champonship game. Eventually Jess/CC rallies, but tends to an injured opponent instead of making the winning goal.

Meanwhile, the extroverted Bill/Wyatt is accompanied to the high school by the socially awkward Wyatt/Bill and quickly puts him on others' radar. However, his 'cool' demeanor doesn't impress the Yale reps. While waiting in the hall, Wyatt's lifetime friend and crush Ariana approaches Bill/Wyatt, confesses her feelings for Wyatt and invites him to a party.

In the evening, the Walkers return to the telescope, but discover a lense is missing, which will have to be sent from Switzerland. Dejected, they bump into Angelica outside, who's a Lyft driver and drives them home.

Bill/Wyatt and Jess/CC sneak off to the party, while their 'adult' counterparts are cornered by Jess' monthly moms gathering. They cut it short to hurry off to the teen party. Bill/Wyatt blocks Ariana from kissing him and punches out Wyatt's bully. Wyatt/Bill and Jess/CC arrive, just as CC/Jess is livening the party with a 'Bust a Move' dance routine. 30 The family must continue in the switched bodies, but now CC/Jess insists the whole project team participates in the presentation. She discovers that her mom constantly sings her praises and sacrifices tons to support her soccer camps. Jess/CC aces CC's math test and discovers how well CC's doing. When they see each other again, they both apologize.

Before they can start the presentation, Bill/Wyatt calls the rest of the family to Bill's band Dad or Alive's show, as Wyatt/Bill is missing. They find him hiding in the toilets, afraid to perform in front of millions of viewers. Feeling he needs everyone's help to do it, he enlists his family as back up vocals. Initially shaky, by the end of the song, Wyatt/Bill finds his voice, and Dad or Alive is selected to go on to Hollywood. Jess' team and Mr. Molson come to tell her that Atlas won the account, and Jess the promotion.

As Wyatt's contact at SpaceX gets the missing lense, the Walkers race to the planetarium to place it on the telescope. Although all six of them are on the platform, nothing happens. Disappointed, Angelica gives them a lift home. As they climb out, CC/Jess wishes Angelica a merry Christmas and states that they weren't successful in fixing the telescope and Angelica points out they were to 'fix what's broken'.

On Christmas morning, the Walkers wake up in the living room to find themselves back to normal. Wyatt gets notification that Yale doesn't believe he's ready yet. Then he finds Ariana outside and they share their first kiss. Then the National Soccer Team recruiter comes by the house to let CC know they are still interested, as showing compassion for her opponent in lieu of marking the goal showed character.